Detailed Instructions: Given a text, write a compressed version of it in a single sentence.
Q: Big Sisters helps fill that void by matching caring, responsible adult volunteers with at-risk girls, ages 8 - 14. A Big Sister is a mentor, a friend and a role model, helping a young girl to develop the self-confidence and life skills necessary to become a responsible, productive and successful adult.
A:
A Big Sister is a mentor, a friend and a role model, helping a young girl to develop the self-confidence and life skills necessary to become a responsible, productive and successful adult.